running to lean

This is a discussion on running to lean within the General Help forums, part of the LSx Technical Help Section category; My car is running to lean I keep getting p0171 and p0174 I cleaned the Maf...it also stumbles sometimes. One ...

running to lean

My car is running to lean I keep getting p0171 and p0174 I cleaned the Maf...it also stumbles sometimes. One o2 sensor has Ben changed all the others are original...passenger side catalyst has been replaced

Agree. Throw the SLP MAF away and get a stock or stock replacement MAF back on the car. Our car came with a modded MAF and a stumble that drove me nuts until I did the research. Other possibilities could be defective O2 sender(s), a post MAF air leak that is drawing unmetered air into the engine, or a vacuum leak that would have the same effect.

Agree. Throw the SLP MAF away and get a stock or stock replacement MAF back on the car. Our car came with a modded MAF and a stumble that drove me nuts until I did the research. Other possibilities could be defective O2 sender(s), a post MAF air leak that is drawing unmetered air into the engine, or a vacuum leak that would have the same effect.